I control my online identity as much as I can. I don’t like using email addresses / identities that are controlled by a vendor. Like phone # portability, this allows me to switch vendors when I want without (much) disruption. That is the main reason I host my blog and email on my own domain. I used to maintain my own servers to do that (literally in-house). Then I moved them to a hosting company. Then I moved email to Google Apps for Domains (GAFD).
GAFD is pretty cool. It allows you to put many services (i.e., mail, calendar, docs, sites, chat) behind your own domain. Other Google services don’t exactly fit this model, and so they aren’t supported. For example while App Engine does allow you to use your own domain, you probably don’t need to host your App Engine development portal from within your domain. Not too big a deal.
But for the services that use your contact list (e.g., Voice, Wave, and Reader), I really don’t want to use my GMail address and certainly not the contacts list I have there.
I am at a loss to understand why Google doesn’t have a corporate policy that products must support GAFD. Isn’t GAFD an important part of Google’s business model? Obviously not as important as trying to sell us things we don’t want, but certainly strategic against Microsoft.